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Answers

So, therefore...1+2=1;Difference between the above and below equations is 2. 2+3=3;Difference between the above and below equations is 3.3+4=6;Difference between the above and below equations is 4.4+5=10;Difference between the above and below equations is 5. 5+6=15;So if we used our common sense... The difference here is 6... 6+7=?So the answer here is 21 because 15 +6=21...